1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x26a3f8d9a8fa1b1a721140e9290ef329503c7e41b2f27bf35eac3800862c5f02. Chain 2 (Bitcoin): anchored in block 953694 (2026-06-14T21:38:09Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/6ba4c663-37ba-4ad3-b65a-c61b811a0acd.json and https://artists.proofprofile.net/proofs/artist/6ba4c663-37ba-4ad3-b65a-c61b811a0acd.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9e458ba2c285eac929a449317fadbbee93dd627afb6fad2f521fbfab86b6e38d. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXF9Q2476792.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x020fa6a565d3504ed812c13b28879a806c77fa4a71b14c26876355b3c9a98295. Chain 2 (Bitcoin): anchored in block 958621 (2026-07-18T22:59:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXF9Q2476793.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x313095246cba56a5ad9c05dc826225cd3b6c4e08d05a6cbd09c0ce6d7ca677bc. Chain 2 (Bitcoin): anchored in block 958357 (2026-07-17T03:33:42Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXF9Q2476794.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xf5c2b078e8003c3a64018f8837ca0d486b0126f7271ea3719beff460528e8baf. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXF9Q2476796.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xdc33d00c684ec8db74e8f0185a733bff43072bfa5cf2b46793caa838089711c4. Chain 2 (Bitcoin): anchored in block 958951 (2026-07-21T05:00:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXF9Q2476797.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x77f63083348bb9e6dad7a8cc30d4bc9101bc7d57e50ff38aaaa5f287ad71da3e. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXF9Q2476798.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc5a7260971d77cbe5b4415078c61e31256ff341cc60ee7c2e1f201d742cf3f0a. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXF9Q2476799.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3ec6c23ced5b04e147d0bc2a2022fa10bf82c42d30ad1186f38f46142bf50f83. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXF9Q2476800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6bbf046072d38f0d1994cc15073583808d6ec4c1961bd50eedbfc3392370656b. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXF9Q2476801.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1bacc0c897cb0a77f7638ec0f782661cb5ff7f68b801f942ded6c177147c61be. Chain 2 (Bitcoin): anchored in block 956639 (2026-07-04T11:19:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXF9Q2476802.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x23f68832156cf6074e2a372b54021d516046bd54c6649282753a8097bc95079e. Chain 2 (Bitcoin): anchored in block 958613 (2026-07-18T21:35:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXF9Q2476803.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x885ae53550275331ce2e32f4e849b6763ef6f303c5b6ecc9e0bad8ced70558ac. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXF9Q2476804.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd8e1537cc7c9659f9ab6c6ff4d9e89ea73cfe8dd5138ce0256bfb1869e6244a6. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXF9Q2507039.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcd14ea30c9fd0ba78d17b94a5de6a33cccc36919be8a47287369f8137d03cb68. Chain 2 (Bitcoin): anchored in block 958931 (2026-07-20T21:15:01Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/GXF9Q2507040.